Friday, October 12, 2012

In Internet Explorer you see "Certificate Error: Navigation Blocked":
as usual, when visiting sites with self signed certificates or unknown
CA.
When
pressing the continue to site not recommended blabla button, nothing changes, it just
stays on the same page.

So, there is a windows
upgrade, KB2661254 (Microsoft Security Advisory: Update for minimum
certificate key length) released on 9 October (I think), that prevent
access to some https web sites using Internet Explorer.

So,
you must upgrade your web servers to 1024 or 2048 bit keys, or
uninstall such windows upgrade, or make changes in the windows registry
to lower the minimum certificate key length (search the KB article on the Microsoft site).